Reviewed By David B (Lockport, NY) Reviewed for a 2009 Hummer H3 —3/30/2015 12:08 PM
Saw a 30 mile increase with the first tank of fuel...it will pay for itself in 6 months...better fuel economy with greater performance!!!
Reviewed By Aric M (Hanna city, IL) Reviewed for a 2011 Chevy Silverado —6/2/2015 3:30 PM
This was pretty good programmer i could really tell the difference in acceleration and power. I have not had it long so still unsure of mpg gains but it seems like a tank of gas goes further than before. Was a bit expensive but at 20% off had to try it!